81 lines
2.0 KiB
Bash
Executable File
81 lines
2.0 KiB
Bash
Executable File
#!/bin/sh
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TARGET=$1
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LANG=C
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cat << EOF > ${TARGET}/message
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** WMI Rescue Linux (amd64) booting **
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EOF
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for cmd in cat echo find insmod mkdir mount sh switch_root tar; do
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ln -s busybox ${TARGET}/bin/${cmd}
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done
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cat << EOF > ${TARGET}/init
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#!/bin/sh
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# WMI Rescue Linux init script.
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# (C)2011 Michał Siejak <masterm@wmi.amu.edu.pl>
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# (C)2012-2017 Mateusz Hromada <ruanda@wmi.amu.edu.pl>
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# Print message banner
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cat /message
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# Mount virtual filesystems
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mount -t proc proc /proc
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mount -t sysfs sysfs /sys
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mount -t devtmpfs devfs /dev
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# Create dev directories
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mkdir -p /dev/pts
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mkdir -p /dev/shm
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# Create mount points
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mkdir /rootfs
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mkdir /mnt
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mkdir /mnt/squashfs
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mkdir /mnt/tmpfs
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# Load modules
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insmod /lib/modules/4.9.0-3-amd64/kernel/drivers/block/loop.ko
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insmod /lib/modules/4.9.0-3-amd64/kernel/fs/squashfs/squashfs.ko
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insmod /lib/modules/4.9.0-3-amd64/kernel/fs/overlayfs/overlay.ko
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# Mount root filesystem
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echo "INITRAMFS: Mounting overlayfs branches ..."
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mount -t squashfs -o loop,ro /rootfs.squash /mnt/squashfs
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mount -t tmpfs -o mode=755,rw tmpfs /mnt/tmpfs
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mkdir /mnt/tmpfs/rw
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mkdir /mnt/tmpfs/work
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mount -t overlay -o rw,workdir=/mnt/tmpfs/work,upperdir=/mnt/tmpfs/rw,lowerdir=/mnt/squashfs overlay /rootfs
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# Extract any addon packages
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if [ -n "$(find . -maxdepth 1 -name '*.tar')" ]; then
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for i in /*.tar; do
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echo "INITRAMFS: Extracting: $i ..."
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tar x -f $i -C /rootfs
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done
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fi
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echo "INITRAMFS: Preparing rootfs environment ..."
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# Move aufs branches to new root
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mkdir -p /rootfs/media/.squashfs
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mkdir -p /rootfs/media/.tmpfs
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mount --move /mnt/squashfs /rootfs/media/.squashfs
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mount --move /mnt/tmpfs /rootfs/media/.tmpfs
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# Move virtual filesystems to new root
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mount --move /proc /rootfs/proc
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mount --move /sys /rootfs/sys
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mount --move /dev /rootfs/dev
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# Switch to new root filesystem
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echo "INITRAMFS: Switching to new rootfs ..."
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exec switch_root -c /dev/console /rootfs /sbin/init
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# Should not reach here
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echo "INITRAMFS: Could not switch to new rootfs! System halted."
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exit 0
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EOF
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chmod a+x ${TARGET}/init
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